1. JSON格式數(shù)組包含obj類型轉成 list,
   如 [{ContentId: 1, IsForever: false}] 格式，

定義實體類

import com.fasterxml.jackson.annotation.JsonProperty;

public class Content {
    @JsonProperty("ContentId")
    private String contentId;

    @JsonProperty("IsForever")
    private boolean isForever;

    public String getContentId() {
        return contentId;
    }

    public void setContentId(String contentId) {
        this.contentId = contentId;
    }

    public boolean isForever() {
        return isForever;
    }

    public void setForever(boolean forever) {
        isForever = forever;
    }
}

當遇到有字段開頭大寫的時候需要用 JsonProperty 注解，不然java不能正確映射 大寫的開頭的字段，他會轉成小寫的，從而導致轉換失敗，
這里使用ObjectMapper來轉換

public class JacksonUtil {
    private static ObjectMapper objectMapper = null;
    static{
        objectMapper = new ObjectMapper();
        // 如果json中有新增的字段并且是實體類類中不存在的，不報錯
        objectMapper.configure(DeserializationFeature.FAIL_ON_UNKNOWN_PROPERTIES, false);
    }

    // 類轉化成JSON
    public static String GetJSON(Object obj){
        try {
            return objectMapper.writeValueAsString(obj);
        } catch(Exception e){
            e.printStackTrace();
        }
        return null;
    }
    // 數(shù)組里面包含obj格式的類的json轉換成類
    public static <T> T getAnyBean(String json, TypeReference<?> valueTypeRef){
        T dataBean=null;
        try {
            dataBean= objectMapper.readValue(json, valueTypeRef);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dataBean;
    }
    // 普通obj類型的json類轉換成類
    public static <T> T getAnyBean(String json, Class c){
        T dataBean=null;
        try {
            dataBean= (T)objectMapper.readValue(json, c);
        } catch (Exception e) {
            e.printStackTrace();
        }
        return dataBean;
    }
}
// cpData的數(shù)據格式為[{ContentId: "1",IsForever: false}]
List<Content> fileTextList = JacksonUtil.getAnyBean(cpData, new TypeReference<List<Content>>(){});
// 轉換成了Content的list

// star數(shù)據格式是{ContentId: "1",IsForever: false}
Content content = JacksonUtil.getAnyBean(star, Content.class);